What was the problem with labor unions becoming acceptable

The problem with unions becoming acceptable was that entrepreneurs had less money.

Explanation:

Unions are the result of a long process in which workers have gradually gained the right to join organized groups.  In 1824, in England, the first centers of mutual aid and vocational training were created. In 1833, English workers organized the first unions as local associations for better working conditions.

When the unions became accepted, the entrepreneurs had to pay all the labor rights, besides paying improvements in the work environment. This all happened with an entrepreneur's money outlay and made them less profitable. In addition, workers would stop the production of the company if their rights were not met, which also caused the loss of entrepreneurs.

when studying cause and effect, historians usually group the causes into different categories. for example, cultural causes reflect how a society’s literature and art convey the way the society saw itself in relation to the rest of the world. another resource that historians use to understand society is pop culture, which tells them the trends and ideas that are preferred by the common people. when studying cause and effect, it’s important to remember multiple causation, or the idea that an effect could have several causes and vice versa.  

the correct option is “cultural causes” since art and literature are related to the culture of a place. culture is determined by literature, art, music.

the correct option is “pop culture” since it reflects the likes and ideas of common people whereas the rest of the options do not focus on common people.  

the correct option is “multiple causation” since it refers to the idea that events are caused by multiple reasons, not just a single one.